public class Test {
    public static void Test(){
        String x="1";
        String y="1";
        String z = new String("1");
        System.out.println(x.equals(y));
        System.out.println(x==y);
        System.out.println("++++++++++");
        System.out.println(x.equals(z));
        System.out.println(x==z);
        x+=x;
        System.out.println(x);
        x.length();
        int kk=1;
        int bb=2;
        Math.min(kk,bb);
    }

    public static void main(String[] args) {
        Test();
    }
}
